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- W4386909897 abstract "Perovskite/carbon interface is a bottle-neck for hole-conductor-free, carbon-electrode basing perovskite solar cells due to the energy mismatch and concentrated defects. In this article, in-situ healing strategy is proposed by doping octylammonium iodide into carbon paste that used to prepare carbon-electrode on perovskite layer. This strategy is found to strengthen interfacial contact and reduce interfacial defects on one hand, and slightly elevate the work function of the carbon-electrode on other hand. Due to this effect, charge extraction is accelerated, while recombination is obviously reduced. Accordingly, power conversion efficiency of the hole-conductor-free, planar perovskite solar cells is upgraded by ≈50%, or from 11.65 (± 1.59) % to 17.97 (± 0.32) % (AM1.5G, 100 mW cm-2 ). The optimized device shows efficiency of 19.42% and open-circuit voltage of 1.11 V. Meanwhile, moisture-stability is tested by keeping the unsealed devices in closed chamber with relative humidity of 85%. The in-situ healing strategy helps to obtain T80 time of >450 h for the carbon-electrode basing devices, which is four times of the reference ones. Thus, a kind of internal encapsulation effect has also been reached. The in situ healing strategy facilitates the fabrication of efficient and stable hole-conductor-free devices basing on carbon-electrode." @default.
- W4386909897 created "2023-09-22" @default.
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- W4386909897 date "2023-09-21" @default.
- W4386909897 modified "2023-10-18" @default.
- W4386909897 title "Octylammonium Iodide Induced In‐situ Healing at “perovskite/Carbon” Interface to Achieve 85% RH‐moisture Stable, Hole‐Conductor‐Free Perovskite Solar Cells with Power Conversion Efficiency >19%" @default.
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- W4386909897 doi "https://doi.org/10.1002/smtd.202300716" @default.
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